Dispensing tube



1,622,526 Mar 1927' s. J. LEWIS DISPENSING TUBE Filed Sept. 17, 1925 11vVENTOR J'amue/ ,J Lew/ls MWE ATTORNEY-5 Patented Mar. 29, 1927.

PATENT OFFIC samvm. J. LEWIS, or DETROIT, mrcnroan.

DISPENSING TUBE.

Application filed September 17, 1825.

This invention relates y im rovements relate particularly to the I capof ispensing tubes such as are commonly used for tooth paste and thelike, the main object of my improvement being to provide an improveddispensing tube whicn is self-closing, permitting the material beingejected by pressure upon the tube, the tube being effectively sealed orclosed when the pressure is released.

Objects relating to details and'economies of construction and operationof my invention will definitely appear from the detailed description tofollow.

The invention is clearly defined and pointed out in the claims. a a

A structure whichis a preferred embodiment of my invention is clearlyillustrated in the accompan ing drawing, forming a part of this appication, in which:

Fig. 1 is a perspective view of a dispensing tube embodying the featuresof my invention. V,

Fig. 2 is a front end-lview of the cap removed from the tube.

Fig. 3 is a detail view, the cap being in longitudinal section on a linecorresponding to line 33 of Fig. 2.

Fig. 4 is a detail longitudinal section showing the capor tip open aswhen material is being ejected therefrom.

In the drawing. similar reference characters refer to similar partsthroughout the several views.

Referring to the drawing, the tube 1 is shown conventionally and is of awell known type made of flexible metal having a threaded neck 2.

Thecap designated generally by the numeral 3 comprises a base portion 4of hard rubber and a tip portion 5 of resilient rubber, the tip portionbeing integrally fixed to the base portion by vulcanizing thereon. Itwill be understood that there would be no distinct or uniform line ofdivision between these parts as is indicated by the drawing but it isdeemed desirable to thus illustrate the same in the drawing for a betterunderstanding of my improvements.

The walls. of the tip portion increase in thickness forwardly to a solidnose portion' 6 of substantial length, this nose portion hav- Serial N0.56,885.

ing a longitudinal slit 7 cut therein providing a discharge orifice, theresiliency of the material holding this slot normally closed. -However,when pressure is applied to the tube, the material is discharged asindicated at 8, the discharge orifice or slot being forced open by thepressure of the material from within. When the pressure is released, theresiliency of the material will close the discharge orifice. The hardrubber portion 4 can be readily threaded to engage the threaded neck.

The tip is preferably flattened as shown as this form is effective inclosing and further the material is discharged in a ribbonlike formwhich is desirable for tooth pasteand the like.

I have illustrated and described my improvements in an embodiment whichI consider very practical and it is believed that this disclosure willenable those skilled in the art to embody or adapt my improvements asmay be esired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. The combination of a flexible dispensing tube having a threaded neckand a .ca comprising a base of hard rubber threaded upon said neck, anda flattened tip of resilient rubber integrally fixed to the base andterminating in a relatively thick wall having a longitudinal slit-likeorifice therein normally closed by the resiliency of the material.

2. A cap for dispensing tubes comprising a base of hard rubber, and aflattened tip of resilient rubber integrall fixed to the base andterminating in a re atively thick wall having a longitudinal slit-likeorifice therein held normally closed by the resiliency of the material.

3. The combination of a dispensing tube and a cap therefor provided witha chambered tip of resilient material terminating in a taperedrelatively thick wall constituting the nose of the tip and having alongitudinal slit therein held normally closed by the resiliency of thematerial.

h 11:1 witness whereof I have hereunto set my SAMUEL J. LEWIS.

